117988815025 has 9 divisors (see below), whose sum is σ = 146308260331. Its totient is φ = 94389678040.

The previous prime is 117988814981. The next prime is 117988815053. The reversal of 117988815025 is 520518889711.

It is a happy number.

The square root of 117988815025 is 343495.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 42475973409 + 75512841616 = 206097^2 + 274796^2 .

It is not a de Polignac number, because 117988815025 - 2⁷ = 117988814897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1683126 + ... + 1751824.

Almost surely, 2^117988815025 is an apocalyptic number.

117988815025 is the 343495-th square number.

117988815025 is the 171748-th centered octagonal number.

It is an amenable number.

117988815025 is a deficient number, since it is larger than the sum of its proper divisors (28319445306).

117988815025 is an frugal number, since it uses more digits than its factorization.

117988815025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137408 (or 68704 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 55.

The spelling of 117988815025 in words is "one hundred seventeen billion, nine hundred eighty-eight million, eight hundred fifteen thousand, twenty-five".